Adjustable crank-disk.



No. 811,426. BATENTED JAN. 30, 1906.

I I. G. MITCHELL. ADJUSTABLE GRANK DISK. A' rrrrrrrrrrrrrrrrrrrrrrrr a.

UNITED STATES PATENT OFFICE.

IRA G. MITCHELL, OF MEEKER, COLORADO, ASSIGNOR OF ONE-TWELFTh TO ARTHURC. MOULTON, ONE-TWELFTH TO FRANK E. SHERIDEN, ONE- TWELFTH TO REUBEN 8.BALL, ONE-TWELFTH TO LEEPETERSON, ONE- TWELFTH TO FRANK H. J O HANTG EN,AND ONE-TWELFTH TO GEORGE E. AIGHER, OEMEEKER, COLORADO.

ADJUSTABLE CRANK- -DISK.

Specification of Letters Patent.

Application filed May 16, 1905. Serial No. 260.457.

. Patented Jan.- 30, 1906.

Im rovementsin Adjustable Crank-Disks, of

which the following is a specification, reference being had therein tothe accompanying drawings.

My invention relates to machine elements, and more particularly to anadjustable crank disk or wheel for use on engines or like machinerywhere crank motion, piston, pitman, or connecting-rods are used totransmit motion of any kind, Whether rotary, slidin oscillating, or gating, one of the objects eing to provide a evice of the characterdescribed which shall be useful in varying, lengthening, shortening,strengthening, or perfectly adjusting the length of the stroke with asingle disk or wheel by turning my eccentric-disk with crank-pin to orfrom the center.

Other objects and advantages of my invention, as well as the structuralfeatures b means of which these objects are attaine will be made clearby an examination of the specification, taken in connection with theaccompanying drawings, in which the same reference-numerals indicatecorresponding por tions throughout, and in which Figure 1 is a sideelevation of a disk, showing my invention in operative position. Fig. 2is a vertical section, and Fig. 3 is a perspective view of theeccentric-disk.

1 designates a disk or wheel which may be made of any desired size ormaterial and preferably formed solid, as shown in the drawings. Thisdisk is provided with a central opening 2, whereby it may be mounted ona driving-shaft, and a groove or kerf 3 longitu- 1dinal of the opening'2for the reception of a 4 designates an adjustable eccentric-diskprovided with a flange or lip 5 and a kerf or groove '6 in the center ofits periphery. Set 1n an opening 7 in said eccentric-disk 4 is acrank-pin 8, en aged by a set-screw 9, whereby it is remova ly securedin operative position and held against rotation. This crankpin isprovided with flanges or rings 10, by

means of which a crank or piston may be held in o erative positionthereon.

The disk 4 is adapted to rotate in a circular opening 11 through thedisk or wheel 1 eccentric of its center, the flange 5 restin against ashoulder 12. A set-screw 13 0' well-known construction and rovided witha j am-nut 14 is screwed into a t eaded opening 15 in the eriphery ofthe disk 1, so that asses into and rests in the its lower en groove6,'thus olding the disk 4 in rotatable position in the circular opening1].. 1s also provided with notches or holes 1 6 in one found necessary.

In operation a crank-shaft is operably mounted on the crank-pin 10,which may The disk of its sides for the reception of the jaws of aeither rotate in the eccentric-disk 4 or be held against rotation by theset-screw 9. The eccentric-disk 4 may rotate in the opening 11 or may beheld against rotation by tightening the set-screw 13 and the j am-nut15. In the largest-sized disks it may be found necessary to employ morethan one set-screw and jam-nut inorder to hold the eccentric-diskagainst rotation. The flange 5 acts as a guard when bearin against theshoulder 12 and tends to aid in olding the eccentric 4 securely in placein the openi'n 11. By means of the adjustable features 0 the mechanismhereinbefore described rotary, sliding, oscillating, or gyrating motionmay be transmitted to engines or other machinery by means .ofpistons,pitmen, or other connecting-rods disk mounted in said recessed portion,said eccentric-disk being provided with an annular flange adapted toengage the recess of said annular body.

' 5 2. A circular body having a recessed portion provided with anoffset, in combination with an eccentric-disk rotatably mounted in saidrecessed portion, said eccentric-disk being provided with an annularflange adapted 10 to engage the offset in said annular body.

3. A cylindrical body having a recessed portion, in combination with aneccentricdisk rotatably monnted insaid recessed ,por: 'tion, saideccentric disk'being provided with a Iperipheral groove and an annularrib, said 15 ri belng adapted to engage the recess-of said cylindricalbody, and'means carried by Said cylindrical body adapted to enter saidgroove.

In testimony whereof I hereunto affix my signature in presence of twowitnesses.

. IRA G. MITCHELL. Witnesses:

R. S. BALL, A. O: M-oULToN.

